Is the sale rescindable if the buyer mistakes a sheep with naturally large udders for one that will yield much milk?
Chapter on Selling the Musarrah (Animal with milk retained in udder)
Al-Mughni
Book of Sales
Primary text
If a buyer believes a sheep with naturally large udders will be a prolific milk producer, they are not granted the option to rescind the sale. The natural physical attribute (large udder) is not exclusively indicative of high milk yield, rendering the buyer's assumption a matter of covetousness (ṭamaʿ) rather than a contractual defect.